We agree, @DanielYergin: “Appalachia’s vast economic resou aspwv1970-01-01T00:00:00-05:00January 1st, 1970|Twitter| We agree, @DanielYergin: “Appalachia’s vast economic resource base comprises the massive and prolific Marcellus and… https://t.co/lUDKXSBjqx Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail